Life Span
Perennial
Perennial
Type
Broadleaf Evergreen
Grass
Origin
Europe, Russia
Europe, Asia
Types
Symphytum officinale (common comfrey), Symphytum asperum (rough comfrey)
Blue Oat grass
Number of Varieties
2-
0
40000
👆🏻
Habitat
Cold Regions, stream banks
Cropland, gardens, Grassland, Roadsides
USDA Hardiness Zone
6-114-9
0
99
👆🏻
AHS Heat Zone
-
-
Sunset Zone
21,22
1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 15, 16, 17, 23, 24
Habit
Upright/Erect
Clump-Forming
Plant Size
Minimum Height
20.00 cm20.50 cm
0
3900
👆🏻
Minimum Width
90.00 cm30.50 cm
0
6350
👆🏻
Plant Color
Flower Color
White, Light Pink
Brown
Flower Color Modifier
Bicolor
Bicolor
Fruit Color
Orange Red
Brown
Leaf Color in Spring
Red, Green, Copper
Gray Green
Leaf Color in Summer
Green, Blue Green
Light Green
Leaf Color in Fall
Green, Blue Green
Dark Green
Leaf Color in Winter
Red, Dark Green, Burgundy, Bronze
Tan, Brown
Shape
Leaf Shape
Oval
Grass like
Thorns
✔
✘
✔
✘
Plant Season
Spring, Summer, Fall, Winter
-
Growing Conditions
Sunlight
Full Sun, Partial Sun, Partial shade
Full Sun, Partial Sun
Growth Rate
Medium
Medium
Type of Soil
Loam, Sand
Loam
The pH of Soil
Acidic, Neutral
Acidic, Neutral
Soil Drainage
Well drained
Average
Bloom Time
Late Spring, Early Summer, Summer
Early Summer
Repeat Bloomer
✔
✘
✔
✘
Tolerances
-
Drought
Where to Plant?
Container, Ground
Ground
How to Plant?
Root Division, Transplanting
Seedlings
Plant Maintenance
Low
Medium
Watering Plants
Watering Requirements
Allow to dry out slightly between watering, Water daily during growing season
Does not require lot of watering, Water occasionally
In Summer
Lots of watering
Lots of watering
In Spring
Moderate
Moderate
In Winter
Average Water
Average Water
Soil
Soil pH
Acidic, Neutral
Acidic, Neutral
Soil Type
Loam, Sand
Loam
Soil Drainage Capacity
Well drained
Average
Sun Exposure
Full Sun, Partial Sun, Partial shade
Full Sun, Partial Sun
Pruning
Cut or pinch the stems, Remove dead leaves
Remove damaged leaves, Remove dead branches, Remove dead leaves
Fertilizers
14-14-14 Fertilizer, All-Purpose Liquid Fertilizer, can go long without fertilizers
All-Purpose Liquid Fertilizer
Pests and Diseases
Aphids, Stem spot
Red blotch
Plant Tolerance
Shallow soil, Sun
Drought
Flowers
Showy
-
Flower Petal Number
Single
Single
Fruits
Showy Fruit
✔
✘
✔
✘
Edible Fruit
✔
✘
✔
✘
Fragrance
Fragrant Flower
✔
✘
✔
✘
Fragrant Fruit
✔
✘
✔
✘
Fragrant Leaf
✔
✘
✔
✘
Fragrant Bark/Stem
✔
✘
✔
✘
Showy Foliage
✔
✘
✔
✘
Showy Bark
✔
✘
✔
✘
Foliage Texture
Medium
-
Foliage Sheen
Glossy
Matte
Evergreen
✔
✘
✔
✘
Invasive
✔
✘
✔
✘
Self-Sowing
✔
✘
✔
✘
Attracts
Ants, Butterflies, pollinators
-
Allergy
Antibacterial, Peripheral Edema
Asthma, Itchy eyes
Uses
Aesthetic Uses
Cottage Garden, Showy Purposes
-
Beauty Benefits
Acne, Beautiful Skin, Reduce Bruises, Remove blemishes
-
Edible Uses
✔
✘
✔
✘
Environmental Uses
Air purification, Fixes Nitrogen
Air purification
Plant Benefits
Medicinal Uses
Asthma, Diarrhea, Obesity, Osteoarthritis
Arthritis, Headache, Stomach pain
Part of Plant Used
Leaves, Twigs
Whole plant
Other Uses
Used for its medicinal properties
Used as a nutritious food item
Used As Indoor Plant
✔
✘
✔
✘
Used As Outdoor Plant
✔
✘
✔
✘
Garden Design
Container, Feature Plant, Foundation, Groundcover, Hedges, Mixed Border, Tropical
Bedding Plant, Feature Plant, Groundcover
Botanical Name
Symphytum asperum
ARRHENATHERUM
Common Name
Comfrey,Black Root, Blackwort, Bruisewort
Oatgrass
In Hindi
Blackwort
जई घास
In German
Blackwort
Ährengras
In French
Blackwort
Folle avoine
In Spanish
Blackwort
oat Grass
In Greek
Blackwort
βρώμη Grass
In Portuguese
Blackwort
aveia-
In Polish
Blackwort
Owies trawa
In Latin
Blackwort
oat Grass
Kingdom
Plantae
Plantae
Phylum
Magnoliophyta
-
Class
Magnoliopsida
Liliopsida
Order
Lamiales
Poales
Family
Boraginaceae
Poaceae
Genus
Symphytum
Danthonia
Clade
Angiosperms, Eudicots, Rosids
Angiosperms, Commelinids, Monocots
Tribe
-
Aveneae
Subfamily
Boraginoideae
Danthonioideae
Number of Species
35450
1
27800
👆🏻